Development of a Handmade Conductivity Measurement Apparatus and Application to Vegetables and Fruits

• Autores: Seng Set, Masakazu Kita
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 91, Nº 6, 2014, págs. 892-897
• Idioma: inglés
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• Resumen

  • This paper describes the development of a simple handmade conductivity measurement apparatus based on a Kohlrausch bridge with inexpensive materials. We have examined the reliability of this apparatus with standard solutions and then measured juices of vegetables and fruits as well as a sports drink. Comparisons to total alkali content as determined by titration were made. The handmade apparatus was introduced to high school chemistry classes through a lesson on the conductivity of electrolyte solutions. The results showed that the developed apparatus could be used effectively for teaching high school chemistry.